反应详情

温度

0 °C

Methyl magnesium bromide (3M in ether, 3 eq.) was added dropwise to a stirred mixture of N-methoxy-N-methylhept-6-enamide 58 in THF (0.1 M) cooled at 0° C. After sting for 1 h at 0° C., the mixture was poured into sat. aq. NH4Cl and diluted with EtOAc. The aqueous layer was further extracted with EtOAc, the combined organic layers were washed with brine and dried (Na2SO4). Evaporation of the solvent at 30 mbar afforded the title compound (96%) as a colorless oil. 1H NMR (400 MHz, CDCl3, 300 K) δ 5.81 (ddt, J 17.1, 10.3, 6.7, 1H), 5.02 (dd, J 17.1, 1.5, 1H), 4.97 (d, J 10.3, 1H), 2.46-2.43 (m, 2H), 2.15 (s, 3H), 2.10-2.05 (m, 2H), 1.65-1.57 (m, 2H), 1.45-1.37 (m, 2H).

1. extractionThe aqueous layer was further extracted with EtOAc
2. washthe combined organic layers were washed with brine
3. dry with materialdried (Na2SO4)
4. customEvaporation of the solvent at 30 mbar